Report SMBIOS Wake-up Type

Wake-up type identifies the event that caused the system to power up. Only power switch and Wake-on-LAN are currently implemented. The list of values is defined in section 7.2.2 System - Wake-up Type. Ref: SMBIOS Reference Specification 3.6.0 Signed-off-by: Tim Crawford <[email protected]>
system76 · Jan 10, 2023 · 093c5d4 · 093c5d4
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diff --git a/src/board/system76/common/include/board/power.h b/src/board/system76/common/include/board/power.h
@@ -12,6 +12,21 @@ enum PowerState {
 
 extern enum PowerState power_state;
 
+// Ref: SMBIOS 3.6.0, 7.2.2 System - Wake-up Type
+enum WakeType {
+    WAKE_RESERVED,
+    WAKE_OTHER,
+    WAKE_UNKNOWN,
+    WAKE_APM_TIMER,
+    WAKE_MODEM_RING,
+    WAKE_LAN_REMOTE,
+    WAKE_POWER_SWITCH,
+    WAKE_PCI_PME,
+    WAKE_AC_POWER_RESTORED,
+};
+
+extern enum WakeType power_wake_type;
+
 void power_init(void);
 void power_on(void);
 void power_off(void);

diff --git a/src/board/system76/common/power.c b/src/board/system76/common/power.c
@@ -125,6 +125,9 @@ extern uint8_t main_cycle;
 
 enum PowerState power_state = POWER_STATE_OFF;
 
+// Note: Must not be Reserved (0x00) or Unknown (0x02) when reported.
+enum WakeType power_wake_type = WAKE_UNKNOWN;
+
 enum PowerState calculate_power_state(void) {
     //TODO: Deep Sx states using SLP_SUS#
 
@@ -429,6 +432,7 @@ void power_event(void) {
                 if (config_should_reset())
                     config_reset();
                 power_on();
+                power_wake_type = WAKE_POWER_SWITCH;
 
                 // After power on ensure there is no secondary press sent to PCH
                 ps_new = ps_last;
@@ -548,6 +552,7 @@ void power_event(void) {
         DEBUG("%02X: LAN_WAKEUP# asserted\n", main_cycle);
         if (power_state == POWER_STATE_OFF) {
             power_on();
+            power_wake_type = WAKE_LAN_REMOTE;
         }
     }
 #if LEVEL >= LEVEL_DEBUG